Robin can you give examples of ProAm publications based on star analyzer results?
Also, just to make sure I’m following, with respect to EW and dividing vs subtracting the continuum. In the case of planetary nebulae where the continuum level is often very low, correction for instrument response is necessary but correction for the continuum is probably moot, right?
provided you have corrected for instrument and atmosphere and the continuum is effectively zero you can just measure the line strength directly. (not EW of course, that will give you a crazy answer where there is no continuum to measure relative to)
The main use in the pro field for the Star Analyser has been to give an early alert of the nature of new objects rather than anything quantitative. There are a couple of peer reviewed papers which mention the Star Analyser I believe, one is discovery of a new WR star and another is using it to measure high speed variations in spectra stochastically looking for fast instabilities in stars. I will try to dig them out. There are a few novae that have been first recorded using a Star Analyser and possibly mentioned in ATels. There have also been a few poster papers presented at pro conferences, one on Nova Del 2013 I think. This spectrum I took was the first to suggest an increase in brightness could be a very rare near field gravitational lensing event
Another interesting application is looking for rapid short lived outbursts in T Tauri or flare stars
I detected an example here
and Andrew Smith is commisioning an automatic monitoring system using a similar technique here
Italian Amateur Claudio Balcon has built a slit spectrograph using an SA100, similar to my ALPY 200 and has confirmed and classified a few supernovae officially.
This is no means an exhaustive list and if anyone knows other applications for the Star Analyser in the pro field I would love to hear about them
Edited by robin_astro, 15 December 2019 - 02:09 PM.